ESP/BAS
This combined system warning indicator covers the Electronic Stability Program (ESP) and the Brake Assist System (BAS). These systems work together, and a fault in either, or both, will cause the light to come on. If it remains on, see your dealer or authorized service center as soon as possible.
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ESP is what one manufacturer calls its Stability Control System. Click this link to learn more. BAS helps in emergency braking situations when the driver can’t push the brake pedal hard enough. A sensor recognizes the attempt at full braking and transmits the signal calling for full brake pressure from the hydraulic booster reducing the vehicle’s stopping distance.
This is essentially the same as the BAS/ASR (Anti-Slip Regulation) system, but do match the acronyms. You can learn more about BAS/ASR here.
The systems are all electronic enhancements. The enhancements will not be available until repairs are performed. However, the brakes will operate normally and the vehicle will be safe to drive. Do so with care.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY